Wide brush section



Aug. 1, 1939. L. c, HEROLD WIDE BRUSH SECTION Filed June 13, 1936 2Sheets-Sheet l PEG-3B Aug. 1, 1939. L. c. HEROLD WIDE BRUSH SECTIONFiled June 13, 1936 2 Sheets-Sheet 2 Patented Aug. 1, 1939 UNITED STATESPATENT OFFiCE Application June 13,

6 Claims.

This invention relates to an improvement in rotary brushes and moreparticularly to a novel structure for a Wide brush section.

Wide rotary brushes are often built up from thin individual sectionsassembled upon and secured to the shaft by which they are rotated. Thesebrush sections are generally thin so that a large number of them must beassembled on the shaft to provide a brush of the length usually desiredin the Various industrial processes where such brushes are used. One ofthe objects of the present invention is to provide thicker or widerbrush sections so that a smaller number need be handled in assemblingsufficient brush material along a shaft to provide a brush of a givenlength.

Another feature of my invention is the provision of novel structuralmembers for assembling a plurality of bristle rings into a single unitfor further handling.

My invention also provides novel features in the mounting of bristlesections whereby mounting plates of a given size may be utilized in theformation of brush sections adapted to fit shafts of varying diameters.

Other novel features of my invention will be apparent from theaccompanying specification and drawings and the essential featuresthereof Will be summarized in the claims.

In the drawings, Fig. l is a plan vieW of a brush section embodying myinvention; Fig. 2 is a sectional view along the line 2-2 of Fig. 1;Figs. 3A, 3B, 3C, 3D and 3E. show the structure of Fig. 2 indisassembled position; Fig. 4 is a View similar to Fig. 2 showing amodification in which the relationship between the bristle rings and theside plate mountings has been varied to change the internal diameter ofthe section; while Figs. 5 and 6 show a modified form of brush sectionbefore and after assembly.

My invention relates broadly to a mounting for a plurality of bristlerings side by side in axial bristles.

aiinement regardless of the details of construction of the individualbristle rings. For instance in the embodiment shown, bristle rings 5 land ii are assembled in a unitary structure by means of plate mountingsbut I do not desire to be limited in the particular type of bristle ringutilized in forming wide brush sections other than by the appendedclaims when construed in view of the prior art.

The brush sections it and i2 each comprises a central ring i to, l 2aabout Which is looped bristle material Mb, 5279, which in the presentinstance composed of a large number of individual However my inventioncontemplates 1936, Serial No. 85,085

that bristle tufts or knots or other form of bristle assembly might beincorporated in my invention if desired. The combination of the rings Maand lZa with the bristle material looped thereabout as shown in Figs. 3Band 3D I have referred to hereinafter in both specification and claimsas a bristle ring or brush section.

The mounting means for the bristle rings or brush sections comprises aplurality of plate members l3, l4, E5 of which the plate member it liesbetween adjacent bristle rings in engagement with both of them when thebrush is assembled, and the plates i3 and i5 engage the outer surfacesof the bristle rings so that the three plates provide a pair of platemembers engaging each side of each bristle ring with the plate It forming a common member of each pair. The additional plate member necessaryto engage the outer surface of the second bristle ring is suitablysecured to one of the side'plate members forming a mounting for thefirst bristle ring so that I build up the bristle rings by securing themounting of one to the mounting of the other utilizing a portion of onebristle ring mounting to provide a part of the mounting for the secondring. In other Words, I do not simply form a plurality of bristle ringseach with its individual side plate mounting members and thereaftersecure them together, but I achieve the simplicity, cheapness andlightness possible by utilizing one side plate mounting to form aportion of the bristle ring mounting structure for two diiferent brushsections. Preferably the means for securing the various plate memberstogether comprises tongues struck up from one member of the pair ofplates on opposite sides of a given brush section, these tongues beingbent at right angles to the plate and extending toward and beyond thecoacting plate member and there bent down on the coacting plate memberto clamp two plate members together on opposite sides of a brushsection.

In the forms shown in Figs. 1 to 4 the securing tongues for the brushsections it and i2 are both struck up from the plate member i i. Onehalf of these tongues indicated at Ma are bent toward the plate memberl3 and the other half it?) are bent toward the plate member l5. Inassembling the brush the tongues ita pass through the bristle materiallib to a point beyond the outer face of plate member I i! to clamp thebristle material I lb between plates l3 and M as shown in Fig. 2. In alike manner the tongues Mb pass through the bristle material l2b beyondthe outer face of plate member 15 and are then bent radially outward andclamped against the outer face of plate member I to clampingly securethe bristle ring I2 between the plates I4 and I 5. This is best seen inFig. 2.

By thus providing tongues bent outwardly from one of the side platemountings of a brush section I may add to that brush section a secondsection by the addition of only one other side mounting plate. In theform illustrated I have thus joined together two brush sections but itis obvious that by providing additional tongues on the plate member I5extending toward the right as seen in Fig. 3E in a manner analogous tothe tongues Mb, I might continue to .add a third bristle ring to thecombination by the use of only one additional side mounting plate.

A modified form of mounting is shown in Figs. 5 and 6. Fig. 5 is anexplosion view showing the parts in position for assembly and Fig. 6shows the same parts completely assembled. Here plates 22 are identicalannular metal rings each provided with tongues 22a struck up from theirinner peripheral edges. Each ring is rotated relativeito the precedingone in the series so that the tongues of one ring are staggered betweenthe tongues of the next ring in the series. Each pair of plates 22 formsa mounting for one of the brush sections23. Obviously, as many units asdesired may be secured together in this manner. On the outside of thelast section 24 in the series is placed a plain annular ring 25 like I5.When the brush sections are assembled as shown in Fig. 6 the tongues ofeach plate extend through the brush material of the adjacent brushsection and are bent down upon the next plate in series to hold a pairof plates together.

It will be noted in all forms of my device illustrated that the platemembers I3, I4, I5 and 22 are annular in form with tongues struck upfrom the inner peripheral edge of one of the plate members, thesetongues being extended through the adjacent brush material and bent overupon a coacting side mounting plate to clamp the brush material betweentwo plates. It will be noted that the tongues I la, I4b and 22a alsoprovide securing means for the rings Ila, l2a, 23a and 2411 as. theyengage these rings upon their outer circumferences so as to position therings Ila, I2a, 23a and 24a centrally of the plates I3, I4, I5, 22 and25. In the modification shown in Fig. 4 the tongues Ma and Nb engage theinner edge of rings I6 and H (which here perform a function similar tothat of rings Ila and I2a) and here again the tongues provide centeringmeans for the bristle rings.

It will be noted that as between Figs. 2 and 4,

the rings I la and I2a in Fig. 2 lie radially inward-' ly from thetongues I la and Nb, whereas in Fig. 4 the rings I6 and I! lie radiallyoutwardly of the tongues. I vary the construction of my brush sectionsin this manner to change the internal diameter of the brush section sothat the section of Fig. 2 is adapted to fit a shaft I8 of smallerdiameter than the shaft I9 of Fig. 4. This variation is accomplished bymaking the annular plate members I3, I4 and I5 with central openings ofgreater diameter than the shaft to be accommodated and making the ringsI6 and IT with the same internal diameter as the openings in the annularside plates where a large shaft is to be accommodated similar to thatshown at I9. In this event the bristle material of the brush 7 sections20 and 2| where it is looped about the rings I6'and l'l radiallyinwardly therefrom engages the shaft I9.

On the other hand, in the form shown in Figs. 1, 2 and 3, the rings Ilaand I2a are of less diameter than the openings in the annular sideplates but of greater diameter than the shaft I8 to be accommodated.This brings the bristle material Ilb and l2b farther toward the centerof the brush section when the brush is assembled, as shown in Fig. 2. Inother words, as. compared with the structure of Fig. 4, we now havelying inwardly from the tongues Ma and MD the thickness of the rings Ilaand I2a plus the thickness of the bristle material looped about theserings so that the internal diameter is reduced to fit the smaller shaftsuch as that indicated at I8.

It will be obvious that by substituting in Fig. 2 rings of properdiameter but of greater radial thickness than the rings Ila and l2a, forinstance the flat rings shown at I6 and H but of smaller diameter, thatthe diameter of the final central opening of Fig. 2 could be stillfurther reduced. I am thus able to utilize side plate mounting membersof a given dimension for an assembly of brush sections having differentinternal diameters for assembly on shafts of different diameters.

What I claim is:

1. In a rotary brush, two annular rings of bristles, a single platemember between said rings and engaging one side of each ring, two otherplate members, one engaging the other side of each ring, and means forclampingly securing said two other plate members against each ringrespectively and against axial movement away from said first named platemember.

2. In a rotary brush, two annular rings of bristles placed side by sideand axially alined, three plates, a single plate between said rings anddirectly engaging the bristles of each ring and one on the outside ofeach ring, whereby to form a pair of plates for mounting each ring ofwhich one plate is common to the two pairs, and means for clampinglysecuring each pair of plates together, said means including tonguesstruck up from one plate of each pair and said tongues extending towardand beyond the other plate of the pair and being there bent down uponsaid other plate.

3. In a rotary brush adapted to be mounted on a round shaft, a pair ofplates, there being central circular openings through said plates ofgreater diameter than said shaft, a ring having a diameter intermediatethe diameters of said shaft and of said openings, bristle materiallooped about said ring, means for securing said plates together onopposite sides of said bristle material and for holding said ringcentered in said openings, and said bristle material when looped aboutsaid ring being sufficient to fit the central opening to said shaft.

4. In a rotary brush adapted to be mounted on a cylindrical member, apair of annular plates, there being central openings in said plates ofgreater diameter than said cylindrical member, a ring of bristlematerial, and means holding said bristle material between said plates ina manner to extend into the central openings thereof in directengagement with said cylindrical member.

5. In a rotary brush, two annular rings of bristles, a single platemember between said rings and engaging one side of each ring, two otherplate members, one engaging the other side of each ring, tongues struckup from said first named plate member, and said tongues being bent inopposite directions toward and beyond said 7 l0 radially outwardly ofsaid ring and passing through said bristle material, and said tonguesextending beyond the other plate and being there bent down upon saidother plate to clampingly secure said material between said plates,whereby said ring is held against movement radially outward by saidtongues and said bristle material is uninterrupted between said annularplates and radially outward therefrom.

LAWRENCE C'. HEROLD.

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